libstdc++-v3/src/codecvt.cc

   1 // Copyright (C) 2000, 2002 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 2, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING.  If not, write to the Free
  16 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17 // USA.
  18
  19 // As a special exception, you may use this file as part of a free software
  20 // library without restriction.  Specifically, if other files instantiate
  21 // templates or use macros or inline functions from this file, or you compile
  22 // this file and link it with other files to produce an executable, this
  23 // file does not by itself cause the resulting executable to be covered by
  24 // the GNU General Public License.  This exception does not however
  25 // invalidate any other reasons why the executable file might be covered by
  26 // the GNU General Public License.
  27
  28 // Written by Benjamin Kosnik <bkoz@cygnus.com>
  29
  30 #include <locale>
  31
  32 namespace std
  33 {
  34   // Definitions for locale::id of standard facets that are specialized.
  35  locale::id codecvt<char, char, mbstate_t>::id;
  36
  37 #ifdef _GLIBCPP_USE_WCHAR_T
  38   locale::id codecvt<wchar_t, char, mbstate_t>::id;
  39 #endif
  40
  41 #ifdef _GLIBCPP_USE___ENC_TRAITS
  42   // Definitions for static const data members of __enc_traits.
  43   const int __enc_traits::_S_max_size;
  44 #endif
  45
  46   codecvt<char, char, mbstate_t>::
  47   codecvt(size_t __refs)
  48   : __codecvt_abstract_base<char, char, mbstate_t>(__refs)
  49   { _M_c_locale_codecvt = _S_c_locale; }
  50
  51   codecvt<char, char, mbstate_t>::
  52   codecvt(__c_locale __cloc, size_t __refs)
  53   : __codecvt_abstract_base<char, char, mbstate_t>(__refs)
  54   { _M_c_locale_codecvt = _S_clone_c_locale(__cloc); }
  55
  56   codecvt<char, char, mbstate_t>::
  57   ~codecvt()
  58    {
  59      if (_M_c_locale_codecvt != _S_c_locale)
  60        _S_destroy_c_locale(_M_c_locale_codecvt);
  61    }
  62
  63   codecvt_base::result
  64   codecvt<char, char, mbstate_t>::
  65   do_out(state_type&, const intern_type* __from,
  66          const intern_type* __from_end, const intern_type*& __from_next,
  67          extern_type* __to, extern_type* __to_end,
  68          extern_type*& __to_next) const
  69   {
  70     size_t __len = min(__from_end - __from, __to_end - __to);
  71     memcpy(__to, __from, __len);
  72     __from_next = __from;
  73     __to_next = __to;
  74     return noconv;
  75   }
  76
  77   codecvt_base::result
  78   codecvt<char, char, mbstate_t>::
  79   do_unshift(state_type&, extern_type* __to,
  80              extern_type*, extern_type*& __to_next) const
  81   {
  82     __to_next = __to;
  83     return noconv;
  84   }
  85
  86   codecvt_base::result
  87   codecvt<char, char, mbstate_t>::
  88   do_in(state_type&, const extern_type* __from,
  89         const extern_type* __from_end, const extern_type*& __from_next,
  90         intern_type* __to, intern_type* __to_end,
  91         intern_type*& __to_next) const
  92   {
  93     size_t __len = min(__from_end - __from, __to_end - __to);
  94     memcpy(__to, __from, __len);
  95     __from_next = __from;
  96     __to_next = __to;
  97     return noconv;
  98   }
  99
 100   int
 101   codecvt<char, char, mbstate_t>::
 102   do_encoding() const throw()
 103   { return 1; }
 104
 105   bool
 106   codecvt<char, char, mbstate_t>::
 107   do_always_noconv() const throw()
 108   { return true; }
 109
 110   int
 111   codecvt<char, char, mbstate_t>::
 112   do_length (const state_type&, const extern_type* __from,
 113              const extern_type* __end, size_t __max) const
 114   { return min(__max, static_cast<size_t>(__end - __from)); }
 115
 116   int
 117   codecvt<char, char, mbstate_t>::
 118   do_max_length() const throw()
 119   { return 1; }
 120
 121 #ifdef _GLIBCPP_USE_WCHAR_T
 122   // codecvt<wchar_t, char, mbstate_t> required specialization
 123   codecvt<wchar_t, char, mbstate_t>::
 124   codecvt(size_t __refs)
 125   : __codecvt_abstract_base<wchar_t, char, mbstate_t>(__refs)
 126   { _M_c_locale_codecvt = _S_c_locale; }
 127
 128   codecvt<wchar_t, char, mbstate_t>::
 129   codecvt(__c_locale __cloc, size_t __refs)
 130   : __codecvt_abstract_base<wchar_t, char, mbstate_t>(__refs)
 131   { _M_c_locale_codecvt = _S_clone_c_locale(__cloc); }
 132
 133   codecvt<wchar_t, char, mbstate_t>::
 134   ~codecvt()
 135   {
 136     if (_M_c_locale_codecvt != _S_c_locale)
 137       _S_destroy_c_locale(_M_c_locale_codecvt);
 138   }
 139
 140   codecvt_base::result
 141   codecvt<wchar_t, char, mbstate_t>::
 142   do_unshift(state_type&, extern_type* __to,
 143              extern_type*, extern_type*& __to_next) const
 144   {
 145     __to_next = __to;
 146     return noconv;
 147   }
 148
 149   int
 150   codecvt<wchar_t, char, mbstate_t>::
 151   do_encoding() const throw()
 152   { return sizeof(wchar_t); }
 153
 154   bool
 155   codecvt<wchar_t, char, mbstate_t>::
 156   do_always_noconv() const throw()
 157   { return false; }
 158
 159   int
 160   codecvt<wchar_t, char, mbstate_t>::
 161   do_length(const state_type&, const extern_type* __from,
 162             const extern_type* __end, size_t __max) const
 163   { return min(__max, static_cast<size_t>(__end - __from)); }
 164
 165   int
 166   codecvt<wchar_t, char, mbstate_t>::
 167   do_max_length() const throw()
 168   { return 1; }
 169 #endif //  _GLIBCPP_USE_WCHAR_T
 170 } // namespace std